US Tech Job Radar Platform

Build a full-stack website called **US Tech Job Radar** that automatically collects and tracks the latest US tech job openings every day.

**Target roles:**
- SDE / Software Engineer
- Data Engineer
- AI Engineer / Machine Learning Engineer
- Generative AI / LLM / RAG / AI Agent Engineer

**Location:** United States only, including US-based remote jobs. Clearly show city, state, and work arrangement.

**Job details:** Display job title, company, location, salary (if available), experience level, original posting date, first discovered date, source, job description, and direct application link. Never invent missing information.

**Data collection:**
- Integrate real job sources such as Greenhouse, Lever, and Ashby using permitted APIs or feeds.
- Automatically refresh daily and show the last successful update.
- Detect duplicates, track job status, and distinguish newly posted jobs from newly discovered older listings.

**Dashboard features:**
- Jobs posted in the last 24 hours
- Search and filters for role, company, location, experience, salary, date, and remote/hybrid/onsite.
- Sort by newest postings.
- Save jobs and track applications.
- Optional daily email alerts for matching jobs.

**Design:** Clean, modern, responsive dashboard with job cards, filters, and a sidebar.